One thing I have noticed about the planets in jjx is that aside from different coloured dirt, grass, and trees the layout of the ground is basically the same. I think the planets would benefit from having their own unique terrain. some of them could also become home to generated structures. I'll go through all the planets and explain what I had in mind. But these are just my ideas. I wanna hear what other people think to!

ThetisOf all the planets I think Thetis could be changed the most. Thetis is the marine/oacen planet right? But it realy doesn't have more water than any other planets. Wouldn't it be awesome if it had vast oacens with only islands of dry land. They should be deep with sea weed and what not. Here's an image of what I had in mind.